chore(deps): bump spring-boot.version from 2.4.2 to 2.4.4

Bumps `spring-boot.version` from 2.4.2 to 2.4.4.

Updates `spring-boot-maven-plugin` from 2.4.2 to 2.4.4
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/compare/v2.4.2...v2.4.4)

Updates `spring-boot-dependencies` from 2.4.2 to 2.4.4
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/compare/v2.4.2...v2.4.4

)

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